Some experts believe the involvement of Rolls Royce will help to allay concerns about the security of the Bradwellproject.

“Having more trusted UK content, making sure that the plant has secure operating systems, that’s absolutely vital,” said David Livingstone, an associate fellow in international security at Chatham House.

“It would be unacceptable to have a third party nation in control of critical systems. It needs to be secure,” he said.